Mouse woes: When changing handedness of mouse, do you swap the buttons to match? As it happens, I don't, and just keep my muscle memory trained appropriately; I tried swapping the button actions, and just got confused, and besides it's a hostile action when it's a customer's mouse. Your mileage may differ.

Trackballs: Do you mean those piddling little things with the one-inch balls that Logitech sell? They look cute an' all with the ball balanced on them, but I was spoilt forever for using those by the Penny and Giles tracker I used to have use of. The ball was too big to play billiards with, which meant I could nurdle around *very* precisely when needed; if I needed to get the cursor from one end of the screen to the other, I'd put my thumb down on one side of the ball, and *whang* [mimes Pete Townsend's windmill power-chord action]. Sadly, that tracker got left behind when I changed jobs, and P&G had ceased trading. A great loss.

Meanwhile, back at at the point, I use whatever mouse comes to hand; as we speak, [looks down] currently a ThinkPad traveller mouse which happens to match this laptop. Basically anything with a mouse wheel. As for the mouse-ache, that's God's way of saying I've been writing too long, as [blasphemes quietly] I have now, so I'll leave it there.